Map display device, map display system, map display method, and map display program product

A map display method by a map display system having a map information system server, and a map display device connected to the map information system server and to a client terminal so as to be able to communicate with each other, the method comprising:

• generating image data based on raster data, and transmitting the image data to the map display device together with attribute data via a first communication section, by the map information system server;
• controlling to adjust the image data in accordance with the attribute data to produce raster layers, and subject a plurality of raster layers to predetermined processing including normalization conversion processing and conversion correction processing, and then transmit the raster layers to the client terminal via a second communication section, by the map display device.

A map display method by a map display system having a map information system server, and a map display device connected to the map information system server and to a client terminal so as to be able to communicate with each other, the method comprising:

• reading vector data from a database, generating image data based on raster data, and transmitting the image data together with attribute data to the map display device via a first communication section, by the map information system server;
• controlling to adjust the image data in accordance with the attribute data to produce raster layers, and subject a plurality of raster layers to predetermined processing including normalization conversion processing and conversion correction processing, and then transmit the raster layers to the client terminal via a second communication section, by the map display device.

A map display method by a map display system having a map information system server, and a map display device connected to the map information system server and to a client terminal so as to be able to communicate with each other, the method comprising:

• reading vector data from a database in response to a request from the map display device, and transmitting the vector data to the map display device via a first communication section, by the map information system server;
• generating image data based on raster data in accordance with the vector data received by a second communication section, and adjusting the image data in accordance with attribute data to produce raster layers, and subjecting a plurality of raster layers to predetermined processing including normalization conversion processing and conversion correction processing, and then transmitting the raster layers to the client terminal via the second communication section, by the map display device.